Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012

Optimize a model with 130 rows, 48 columns and 260 nonzeros
Presolve removed 37 rows and 3 columns
Presolve time: 0.00s
Presolved: 93 rows, 45 columns, 202 nonzeros
Variable types: 0 continuous, 45 integer (45 binary)
Found heuristic solution: objective 17.0000000

Root relaxation: objective 2.000000e+01, 48 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   20.00000    0   34   17.00000   20.00000  17.6%     -    0s
H    0     0                      18.0000000   20.00000  11.1%     -    0s
     0     0   20.00000    0   36   18.00000   20.00000  11.1%     -    0s
H    0     0                      19.0000000   20.00000  5.26%     -    0s
     0     0 infeasible    0        19.00000   19.99998  5.26%     -    0s

Cutting planes:
  Zero half: 17

Explored 0 nodes (94 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%